24CW640-I/ST

Memory IC Overview

The Microchip Technology 24CW640-I/ST is a 64 Kbit (8K x 8) serial electrically erasable programmable read-only memory (EEPROM). It utilizes an I2C interface with a maximum clock frequency of 1 MHz. The device operates within a supply voltage range of 1.6 V to 5.5 V and supports access times as fast as 450 ns. It features software write protection and is designed for industrial temperature applications, functioning reliably between -40°C and +85°C.

Memory IC Feature Summary

• Supports high-speed I2C communication modes up to 1 MHz
• Includes software-controlled write protection mechanisms
• Provides robust data retention characteristics over extended periods

Memory IC Applications

• Industrial control systems requiring non-volatile data storage
• Consumer electronics utilizing low-voltage power supplies
• Embedded systems needing configuration parameter retention

Memory IC Procurement Notes

Verify the specific package variant against design requirements, as the 24CW640 series includes TSSOP-8, UDFN-8, and CSP options. Confirm that the industrial temperature grade (-40°C to +85°C) aligns with environmental specifications. Ensure compatibility with the target system's I2C bus voltage levels and timing constraints before finalizing procurement.

Memory IC Selection Notes

Select this component when a 64 Kbit capacity is required alongside standard I2C connectivity. The 1 MHz clock speed offers faster performance compared to legacy 400 kHz devices. Consider the 8-TSSOP package for surface-mount assembly needs. Verify that the 1.6 V minimum operating voltage meets the lowest system rail availability during operation.

Memory IC Part Context

This part belongs to the Microchip 24CW series of serial EEPROMs. It shares architectural similarities with other members like the 24CW320 and 24CW1280, differing primarily in storage density. The series is characterized by its compatibility with standard I2C protocols and wide operating voltage ranges suitable for modern embedded designs.

Memory IC Replacement Considerations

Direct pin-compatible substitutes within the same family include the 24CW320-I/ST (32 Kbit) or 24CW1280-I/ST (128 Kbit), provided capacity adjustments are acceptable. Cross-brand equivalents such as the M24C64-W may require verification of voltage thresholds and page size differences.